WO2016018175A1

WO2016018175A1 - Device and method for purifying liquid

Info

Publication number: WO2016018175A1
Application number: PCT/RU2015/000326
Authority: WO
Inventors: Джозеф Львович ШМИДТ; Алексей Леонидович КУЗЬМИН; Глеб Дмитриевич РУСИНОВ; Александр Геннадьевич МИТИЛИНЕОС
Original assignee: Закрытое Акционерное Общество "Аквафор Продакшн" (Зао "Аквафор Продакшн")
Priority date: 2014-07-31
Filing date: 2015-05-26
Publication date: 2016-02-04
Also published as: RU2573520C1; EP3175901A1

Abstract

The group of inventions relates to devices for purifying liquid, primarily drinking water, which devices are intended for use as autonomous devices in domestic conditions, in allotments and gardens and the service industry, and to methods for purifying liquid. In particular, this invention concerns autonomous pressure devices which subject defined portions of liquid to processing under pressure. The device and the method for purifying liquid make it possible to rapidly and efficiently purify liquid by virtue of the fact that the device for purifying liquid is able to discharge all of the unpurified liquid from an unpurified liquid receiving tank when a volume of gas which is greater than the volume of unpurified liquid situated in the unpurified liquid receiving tank is fed in. The technical result is an increase in the degree of purification of the liquid with a simultaneous reduction in the process time for the purification of the liquid.

Description

DEVICE AND METHOD FOR CLEANING LIQUID.

FIELD OF TECHNOLOGY

The group of inventions relates to liquid purification devices, mainly drinking water, intended for use as stand-alone devices in domestic conditions, in summer cottages and garden plots, in service departments, and in liquid purification methods. In particular, this invention relates to autonomous pressure devices that process certain portions of a liquid under pressure, and methods for purifying a liquid using these devices.

The invention may find application for the purification of drinking water and other liquids for domestic use, in the medical and other industries.

BACKGROUND

Known devices for cleaning liquids with gravity feed. Examples of such devices are jugs / decanters and large containers where the treated water is poured, for example, from a tap. Such systems usually have a receiving tank for untreated liquid and a receiving tank for purified liquid, a replaceable filter module filled with filter material. As filter materials, as a rule, ion exchangers and / or activated carbon are used. The principle of operation of such devices for cleaning liquid is extremely simple: the liquid is poured into a receiving tank for untreated liquid, under the action of gravity, it passes through a filter module and enters a receiving tank for purified liquid. In devices with gravity feed, as a rule, coarse sorbents are used.

It is known that finely dispersed sorbents, for example, powdered activated carbon or powdered ion-exchange resin, as well as fine filter materials, for example hollow fiber, membrane or carbon block elements, have high sorption kinetics, which leads to an improvement in the cleaning properties of the filter element. However, the use of the listed filter materials in devices with gravity feed can lead to a decrease in the filtration rate up to the point that the liquid can completely stop passing through the filter module, since the pressure created by the liquid column above the module is not enough to overcome the total hydraulic resistance of the filter material.

For the most effective filtration or purification of the liquid, it is advisable to ensure that the liquid contacts the filter material over the largest possible area, forcing the liquid into the most intense and complete adsorption process to remove impurities present in it.

In the prior art, this problem was partially solved by the creation of autonomous pressure devices for liquid purification. In such devices, the liquid passes through the filter forcibly due to the difference in air pressure created between the receiving tank for the crude liquid and the receiving tank for the purified liquid, i.e. between the input and output sides. Such liquid purification devices are well known.

For example, a fluid dosing and purification system is known from WO 00/71468 A1 (Kimberly-Clark Worldwide Inc. US, publ. 30.11.2000, C02F 1/00), including a container for untreated liquid, and a lid with built-in manual means air injection (bellows), a channel for the crude liquid, in which the filter module is placed, and an outlet for the outlet of the purified liquid. The sealing element mounted on the lid provides the tightness inside the container for the crude liquid, which is necessary to create excess air pressure above the level of the crude liquid. The manual pumping means is equipped with an inlet air valve and an outlet valve for supplying air to the crude liquid tank. The principle of operation of the liquid dosing and purification system is based on forcing air into the upper part of the tank above the level of the crude liquid. When you press the bellows with your hand, compressed air pushes the liquid from the hermetically sealed container for the untreated liquid into the channel, where the liquid passes through the filter module and then enters the intake through the outlet for the purified liquid. A device for cleaning liquids, mainly drinking water, according to the patent of the Russian Federation NA2131759 (ZAO Akvafor publ. 06/20/1999, B01D27 / 02, C02F1 / 18, C02F9 / 00), containing a filter module, adapter sleeve with an internal partition on which located fitting for the supply of cleaned fluid. A tube for supplying the liquid being cleaned is hermetically connected to the fitting. The device further comprises means for forcibly moving the liquid to be cleaned from the tank of the liquid to be cleaned into the filter module, made in the form of a pneumatic supercharger and tubes for supplying the liquid to be cleaned. As a container, it comprises an open container with a crude liquid or a polymer bottle for soft drinks or other food liquids with an external thread on the neck. The device operates as follows. The liquid to be cleaned (dirty water) is pumped through the pipe for supplying the liquid to be cleaned with a pneumatic blower, through the nozzle for supplying the liquid to be cleaned on the adapter sleeve, filtered through the filter material, it is cleaned, and the purified liquid (pure water) through the pipe of the purified liquid discharge on the housing the filter module and the pipe for draining the purified liquid enters the collection tank of the purified liquid (pure water).

A device for cleaning liquid according to US patent Nfi 6136188 (Pasupathicoil R. Soundar Rajan, Gary S. Hess (US), publ. 24.10.2000, B01 D 35/26), including a container for untreated liquid, an air pump, a lid with a retractable spout for draining the cleaned liquid and with integrated filter module. The filter module includes the lower and upper micro sieve, the lower and upper layer of foam, filter material. The air pump is connected to the crude liquid tank and is equipped with a check valve and an air valve. After filling the liquid purification device with water using an air pump, air is manually injected into the crude liquid tank, under the pressure of which the raw water passes through the filter module and enters the consumer.

A device for cleaning liquid according to US patent Na5225078 (Ametek, Inc., publ. 06.07.1993, B01D 27/02). Filter jug used in domestic conditions for cleaning liquids. The jug consists of a housing for purified liquid, a receiving tank for raw liquid, divided by a bellows into the upper and lower parts, a filter element, a cover with an opening for pressure equalization. The pressure drop in this filtering device is created when the consumer presses a hand on an elastic section located in the central part of the cover.

A device for cleaning liquid according to the patent of the Russian Federation Nfl 2095317 (VNPP "Quantum", publ. 10.11.1997, C02F1 / 18, B01 D63 / 08), including a housing in the upper part of which is made a channel with a shut-off body for pressure relief, a cover, a filter unit and means for creating pressure on the liquid to be cleaned, made in the form of a vessel made of elastic material, while the vessel is equipped with inlet and discharge check valves, the filter block is made in the form of a package of filter elements assembled on a collector tube connected to the external medium through mustache outlet pipe mounted in the wall of the housing. The principle of operation of the device consists in the periodic operation of the vessel to create a pressure sufficient for the source liquid to pass through the filter unit and to raise the purified liquid through the outlet pipe for consumption. The pressure vessel is manually actuated.

A device for cleaning liquid, in particular drinking water according to US patent Ns 4636307 (Mitsubishi Rayon Co., Ltd., Japan, publ. 01/13/1987, B01 D19 / 00; B01 D 13/01), including a container for untreated liquid, a cover, which is mounted on a container for untreated liquid, a filter module consisting of an absorbent module and a hollow fiber module, a nozzle for the outlet of the purified liquid, and a manual pressure pumping means equipped with pressure relief means. The filter module is placed in a container for untreated liquid, and a nozzle is put on its upper part. A nozzle for the outlet of the purified liquid protrudes from the nozzle out through the hole in the lid. A manual pressure boosting means with pressure relief means is inserted into the cover. During operation of the pressure injection means, liquid from the tank for the crude liquid flows forcibly through the filter module and leaves through a branch pipe for an exit of clear water. In one embodiment of the device, a filter module is used, in which a hollow fiber module is inserted into the adsorbing element, however, in this case, the liquid purification device is installed on the pipe for supplying tap water under pressure, since the pressure created by hand is not enough to pass through such a filter design module.

The stand-alone cleaning devices described in the prior art have several disadvantages, for example, due to the use of filter modules with finely dispersed sorbents, the liquid being cleaned cannot overcome their total hydraulic resistance without the influence of a stable constant pressure, and therefore, at the end of the filtration process, some liquid will remain in the tank for untreated liquid and will not be able to pass through the filter module by gravity. Also, due to the inability of the consumer to control the degree of physical effort that he exerts during periodic mechanical influence on the injection means during the entire filtration cycle, the excess pressure created by the means of pumping air above the level of the crude liquid will be unstable. Because of this, during the filtration cycle, the uniformity and stability of fluid flow through the filter module is not ensured. In this case, “filtration cycle” should be understood as the transit time of one portion of the crude liquid from the crude liquid tank through the replaceable filter module to the purified liquid tank. Due to the instability of the excess air pressure generated by the injection means, the fluid flows unevenly through the replacement filter module, which leads to inefficient use of the filter material and, accordingly, to a decrease in the degree of purification.

A device for cleaning liquid according to the patent of the Russian Federation Ns 2445999 (CJSC "Aquaphor Production", publ. 03/27/2012, B01 D 27/02, B01 D 35/26).

This invention is the closest in technical essence to the present invention and we have chosen as a prototype. A device for cleaning liquid contains a receiving tank for untreated liquid with a removable cover, a receiving tank for purified liquid, a replaceable filter module filled with filter material, and an automatic means of time-controlled air discharge in the filtration mode (automatic means of discharge). An automatic pumping means pumps air into the receiving tank, creating excessive air pressure above the level of the crude liquid during the entire filtration cycle, i.e., during the passage of one portion of the crude liquid from the receiving tank for the crude liquid 1 through a replacement filter module into the receiving tank for the cleaned liquids. An automatic pumping means is connected to a receiving container for the purified liquid by means of a discharge pipe provided with a pressure control valve.

The automatic means of time-controlled air discharge includes a pneumatic supercharger, a control unit, a power source, a liquid level sensor and at least one feedback means, while the input of the pneumatic supercharger is in communication with the atmosphere. The term "communicated with the atmosphere" should be understood that the pneumatic supercharger at the inlet has a pressure close to atmospheric. The output of the pneumatic supercharger is connected to the input of the control unit, the output of which is connected to the input of the power source, the liquid level sensor and at least one feedback means are connected to the control unit configured to specify the sequence and time modes of operation of the pneumatic supercharger in the filtering mode. The sequence and time modes of operation of the pneumatic supercharger in the filtration mode are set, for example, using a programmable microcontroller located in the control unit, and the excess air pressure is stabilized above the level of the crude liquid using feedback algorithms using feedback means and other sensors or means converting the amount of excess air pressure into a signal for transmission to the control unit.

The prototype device maintains the pressure above the level of the crude liquid constant throughout the filtration cycle, thereby eliminating the problem of uneven flow of the crude liquids through the filter module. However, the prototype does not solve the problem of cleaning all the liquid contained in the receiving tank for the crude liquid, therefore, at the end of the filtration cycle, a certain amount of unfiltered liquid remains in the tank for the crude liquid of the prototype device, which reduces the efficiency of the device and leads to the formation of a stagnant zone. Such a stagnant zone can lead to the development of pathogenic bacteria in the crude liquid. Moreover, maintaining a constant value of pressure above the level of the crude liquid in the case of a decrease in gas pressure involves pumping gas into the receiving tank for the crude liquid, and in case of an increase, discharge of gas into the environment. For this, the prototype device has complex feedback algorithms that specify the sequence and time of the device operation modes.

SUMMARY OF THE INVENTION

The general objective of the group of inventions and the required technical result achieved when using the group of inventions is to develop a device and method for purifying a liquid, in particular drinking water, increasing the degree of liquid purification while reducing the time of the liquid purification process, as well as achieving guaranteed displacement of all crude liquid from the receiving tank for untreated liquids in the most effective way.

The task and the required technical result when using the group of inventions is achieved by the fact that the device for cleaning liquid containing a receiving tank for untreated liquid connected to an automatic means of time-controlled gas injection in the filtration mode by means of a connecting element including a pneumatic gas injection unit, a control unit and source of power; the receiving tank for the purified liquid and the filter module, due to the automatic means of time-controlled gas injection, are capable of displacing all the crude liquid from the receiving tank for the crude liquid, provided that the gas volume is larger than the volume of the crude liquid in a receiving tank for untreated liquid, while an automatic means of time-controlled gas injection is configured to continue the process of filtering the liquid, by displacing part of the liquid from the filter module, after filtering all the liquid from the receiving tank for the crude liquid to the receiving tank for the purified liquid, and that the control unit is configured to directly control the pneumatic gas injection unit, and the fact that the filter module is provided with means to prevent penetration of the purified liquid back into the module, the means being preferably a check valve, which can be located in the upper or lower part of the filter module, and the means that the outlet for the purified liquid in the receiving container for the purified liquid is located in the upper part of the filter module, this means the output of the purified liquid is located above the level of the purified liquid located in the receiving tank for the purified liquid, and the fact that the filter module consists of at least two filtering elements, while the filter module is configured to allow liquid to pass through it, changing the direction of liquid passage at least 1 time, and so that it is preferable that part of the filtered liquid falls into the receiving container for the purified liquid, and a smaller part of the liquid remains in the filter module for humidification of the filtration elements, and that the gas flow, entering the filter module, and changing the direction of passage through the module at least 1 time, captures the liquid particles and together with them is removed from the filter module through the outlet of the purified liquid and that when the gas passes under the action of centrifugal forces, a smaller part of the liquid is retained in the “dead zones” of the filter module.

Also, the task and the required technical result when using the group of inventions is achieved by the fact that the method of cleaning the liquid, which consists in filling the receiving tank with crude liquid, performing a cycle of automatic means of time-controlled gas injection when closing the lid of the water purifier by pumping gas into the receiving tank for crude liquid, under the pressure of which the crude liquid passes from the receiving tank for the crude liquid through the filter module to the receiving tank for the purified liquid, with a gradual decrease in the excess gas pressure until the end of the filtration process with the possibility of further repeating the cycle of the automatic means of time-controlled gas injection, according to According to the invention, the crude liquid under pressure is displaced from the receiving container for the crude liquid with a gas volume greater than the volume untreated liquid in the receiving tank for the crude liquid, and after turning off the automatic means of time-controlled injection of gas, the liquid remaining in the receiving tank for the crude liquid, under pressure of an excess volume of gas, passes through the filter module into the tank for the purified liquid.

The claimed group of inventions is aimed at eliminating these disadvantages of the prototype.

BRIEF DESCRIPTION OF THE DRAWINGS

1. Fig 1. - shows a device for cleaning liquid with a filter module located in the tank for purified liquid and means for the output of the purified liquid located on top of the filter module.

2. Fig 2. - shows a device for cleaning liquid with a filter module located in the tank for purified liquid and means for the output of the purified liquid located at the bottom of the filter module.

3. FIG. 3 - shows a device for cleaning liquid with a filter module located in the receiving tank for untreated liquid and means for the output of the purified liquid located at the bottom of the filter module.

4. FIG. 4 - shows a diagram of the functional relationships of an automatic means of time-controlled gas injection. Accepted conventions: air functional connections

DETAILED DESCRIPTION OF THE INVENTION

A device for cleaning liquid contains a receiving tank for untreated liquid 1 with an upper neck 10 covering it with a structural part 11 and a removable cover 12, a filter module 3, consisting, for example, of three filter elements 4, 5 and 6, a receiving tank for purified liquid 2, an automatic means of time-controlled discharge gas in the filtration mode (automatic injection means) 13, means 18, preventing the penetration of the purified liquid back into the filter module (Fig. 2 and 3) and the outlet means of the purified liquid 7 (Fig. 1).

Automatic pumping means 13 includes a pneumatic pumping unit 16, a control unit 14, a connecting element 15, made, for example, in the form of a pipe, and a power source 17.

The control unit 14 may be, for example, a microprocessor unit (microcontroller) located on the board, containing a volatile data memory, a real-time counter and a computer.

The control unit 14 may be located in the cover 12 (Fig. 1, 2, 3) or in the handle 9 (not shown in the drawings) of the device for cleaning liquid.

The control unit 14 is configured to program the operation of the automatic means of pumping gas 13, in such a way that a gas is pumped into the receiving tank for the crude liquid 1, with a volume exceeding the volume of the crude liquid in the receiving tank for the crude liquid 1, and an automatic gas pumping means 13 shuts off until the complete passage of the cleaned fluid through the filter module 3.

The power source 17 can be located, for example, in the cover 12 (Fig. 1, 2, 3) or in the handle 9 (not shown in the drawings) of the device for cleaning liquid. The power source 17 may be, for example, a power battery or a rechargeable battery.

As a pneumatic discharge unit 16, for example, an air microcompressor or a membrane micropump is used.

The connection between the elements of the automatic injection means 13 is as follows. The output of the power source 17 is connected to the input to the control unit 14, the output of the control unit 14 is connected to the input to the pneumatic discharge unit 16, the output of which is connected to the receiver capacity for untreated liquid 1. Pneumatic discharge unit 16 is in communication with a gas source, for example, with ambient air.

Automatic pumping means 13 is connected to the receiving tank for the crude liquid 1 by means of a connecting element 15 (Fig. 1, 2, 3). The connecting element 15 can be made, for example, in the form of a pipe, tube or hose (not shown), made of a polymeric material.

As mentioned earlier, the control unit 14 sets the operation mode of the automatic gas injection means 13, during which a gas with a volume greater than the volume of the crude liquid is injected into the receiving tank for the crude liquid 1. (Due to this, unlike the prototype, it becomes possible to turn off the automatic means of pumping gas 13 until the complete passage of the liquid from the receiving tank for the crude liquid 1 through the filter module 3, since during the operation of the automatic means of pumping 13 the volume of gas taken from an external source , sufficient for a complete filtration cycle.After turning off the automatic means of pumping gas 13, the process of passage of liquid from a receiving tank for untreated liquid 1 and f ltruyuschego unit 3 is continued due to an excess volume of gas which stayed in the receiving container 1 to the crude liquid.

The filter module 3 consists of two filter elements 4 and 5 and may have a third element 6 filled, for example, with activated carbon (Fig. 1, 2, 3). The installation of the filter module 3 in the receiving tank for the crude liquid 1 can be carried out by screw connection, bayonet connection or snap-fit. The connection with the filter module 3 is equipped with at least one sealing means 8, which holds the air inside the receiving tank 1, allowing you to create excess pressure above the level of the crude liquid. The sealing means 8 is preferably a circular o-ring.

In the design of the filter module 3 described above, the liquid passes through it, changing the direction of passage at least 1 time, however, a significant part of the liquid enters the container for purified liquid 2, and a smaller part of the liquid remains in the filter module 3 and is necessary to moisten the filter elements 4, 5 and 6.

Unlike the prototype, in the inventive device, the use of a filter module of the described design became possible due to the fact that the operating mode of the automatic pumping means 13 is designed to pump gas into the receiving tank for the crude liquid 1 with a volume exceeding the volume of the crude liquid in the receiving tank for the crude liquid 1. Under the excess pressure of the gas, the liquid not only overcomes the total hydraulic resistance, but also passes the filter materials 4, 5 and 6 in a shorter period of time .

The filter elements may be made of various filter materials and / or filled with various filter materials.

For example, in the housing of the filter module 3, the filter element 4 can be made of a dense sorption mixture based on highly effective fine adsorbents, for example, powdered activated carbon, ion-exchange resins of varying degrees of dispersion, ion-exchange fibers, activated carbon fibers, and the filter element 5 is made of a hollow fiber module , or, for example, element 4 is made of carbon block, inside of which a filter element 5, made in the form of a hollow fiber module, is inserted. To prevent infection of the hollow fiber module at the bottom of the filter element 5 can be located element 6, filled with, for example, activated carbon.

However, it should be understood that the combination of filter elements applicable in the present invention is not limited to the examples given.

In the case when the filter module 3 is located in the container for the purified liquid 2, and the outlet for the purified liquid 7 is located in the upper part of the filter module 3 under the action of gas, the crude liquid passes forcibly from top to bottom into the filter element 4, and then, changing direction, from bottom to top passes the filter element 6, element 5 and leaves the space of the filter module 3 through the outlet means of the purified liquid 7 (Fig. 1).

In the case when the filter module 3 is located in the container for purified liquid 2, and the outlet for the purified liquid 7 is located below the filter module 3, under the influence of gas, the crude liquid passes from top to bottom the filter element 4 and then, changing direction, from bottom to top through the internal channel 19 between the filter element 4 and the element 5, and then from top to bottom through the filter element 6 and the filter element 5 enters the receiving tank for the purified liquid 2 (Fig. 2).

In the case when the filter module 3 is located in the tank for the crude liquid 1, and the outlet for the purified liquid 7 is located below the filter module 3, under the action of gas, the crude liquid from the bottom of the receiving tank for the crude liquid 1 enters the filter element 4 and passes it from below upward, further from top to bottom passes the filter element 6 and the filter element 5, and through the outlet means of the purified liquid 7 enters the container for the purified liquid 2 (Fig. 3).

In the receiving tank for the crude liquid 1, gas is injected above the surface of the crude liquid. During the filtration process, the amount of gas above the level of the crude liquid decreases, but after passing a significant amount of liquid into the tank for purified liquid 2, the gas remains in sufficient quantity so that it passes through the filter elements 4, 5 and 6 from the receiving tank for the crude liquid 1, the same sequence in which the liquid to be cleaned passed through the elements. In the process of passing through the liquid purification device, the remaining gas passes into aerosol states, since under the action of centrifugal forces it captures and carries away in its stream liquid droplets remaining in the receiving tank for the crude liquid 1 and in the filter module 3, and is removed from the filter module 3 through the outlet means of the purified liquid 7 (Fig. 1, 2, 3).

In order to prevent dehydration of the filter module 3 after the passage of gas through it, in the design of the filter module 3 Liquid purification devices are provided with so-called "dead zones", for example recesses or cavities. Moisture accumulates in the “dead zones”, which, due to capillary forces, penetrates the filter elements 4, 5 and 6. Keeping the filter module 3 moistened ensures its efficient operation.

After the completion of the filtration cycle, the purified liquid accumulates in the container for purified liquid 2. In order to prevent the purified liquid from rising back into the filter module 3, means 7 (Fig. 1) and 18 (Fig. 2, 3) are provided in the design of the liquid purification device , preventing the penetration of the purified liquid back into the filter module 3.

In the case where the outlet for the purified liquid 7 is located in the upper part of the filter module 3, since it is located above the level of the purified liquid, it is also a means of preventing the purified liquid from entering the filter module 3. (Fig. 1), and may be made in the form of a pipe in the particular case of a fitting or a flexible hose (not shown in the drawings).

In the case where the outlet of the purified liquid 7 into the container for the purified liquid 2 is located in the lower part of the filter module 3, the means 18 that prevent the purified liquid from penetrating back into the filter module 3 is, for example, a check valve, preferably made in the form of a plastic disk material, such as rubber or santoprene. The tool 18 can be located both in the upper (Fig. 2 and 3), and in the lower (not shown) drawings of the filter element 5.

The operation of the device and the method of purification of the liquid are as follows.

The crude liquid is poured into the receiving tank for the crude liquid 1, which is closed with a lid 12.

Automatically or manually turn on the automatic means of gas injection 13. The control unit 14 drives the pneumatic gas injection unit 16, and from an external source, a gas with a volume greater than the volume of the crude liquid in the receiving tank for the crude liquid 1 is supplied to the receiving tank for the crude liquid 1. Under the action of gas, part of the liquid from the receiving tank for the crude liquid 1 is passed through the filter module 3 when the automatic pumping means 13 is turned on, and part of the liquid passes through the filtering module 3 after turning off the automatic pumping means 13.

The cleaned liquid passes the filter elements 4, 5 and 6 sequentially, changing direction, and through the outlet means of the purified liquid 7 enters the receiving tank for the purified liquid 2.

After the bulk of the liquid passes through the filter module 3 into the tank for purified liquid 2, the gas remaining in the receiving tank for the crude liquid 1 passes through the filter elements 4, 5 and 6, in the same sequence in which the liquid to be cleaned passes through and carries liquid droplets remaining in the receiving tank for the crude liquid 1 and in the filter module 3 are removed from the filter module 3 through the outlet means of the purified liquid 7.

At the end of the filtration cycle, the purified liquid accumulates in the container for purified liquid 2 and remains in it until it is used by the consumer, without contact with the filter module due to the means 7 (Fig. 1) and 18 (Figs. 2 and 3), which prevent the penetration of the purified fluid back to filter module 3.

The use of a device and a method for purifying a liquid can increase the degree of purification of a liquid while reducing the time for purifying a liquid, and also eliminates the need to maintain a constant pressure above the level of the crude liquid and ensures complete removal of the crude liquid from the receiving tank for the crude liquid. To confirm the efficiency of the liquid purification device, comparative tests of the liquid purification device of the present invention (hereinafter the invention) and the prototype were carried out:

1. resource hydraulic tests;

2. life tests on a model solution of chloroform;

3. life tests on a model solution of lead ions.

For all tests, the following test mode was selected: 8 hours / day - work, 16 hours - rest. Spilled volume - 1 liter. The interval between spills is 15-20 minutes.

1. Resource hydraulic tests.

As a model solution was used tap water.

The test results are shown in table 1.

Table 1. Results of comparative life-time hydraulic tests.

The data of table 1 show that when the invention is required in significantly less time than when using the prototype. 2. Life tests on a model solution of chloroform (concentration was maintained in the range from 285 to 325 μg / l).

The test results are shown in table 2.

Table 2 The results of comparative life tests to remove chloroform from water.

From the data shown in table 2, it is seen that with the passage of a liquid with a total volume of 300 l through the invention and the prototype, the residual chloroform concentration for the invention is 3.3 μg / l, which is three times less than for the prototype.

3 Resource tests on a model solution of lead ions, (the concentration of lead ions in the solution was maintained in the range from 144 to 156 μg / l).

The test results are shown in table 3.

Table 3 The results of comparative life tests to remove lead ions from water.

From the data shown in table 3 it is seen that with the passage of a liquid with a total volume of 300 l through the invention and the prototype, the residual concentration of lead ions for the invention is 3.4 μg / l, which is almost three times less than for the prototype.

The results of all comparative tests confirm the effectiveness of the invention in terms of increasing the degree of liquid purification while reducing the time of the liquid purification process.

Claims

Formula

1. A device for cleaning a liquid, comprising a receiving container for the crude liquid, connected to an automatic means of time-controlled gas injection in the filtering mode by means of a connecting element including a pneumatic gas injection unit, a control unit and a power source; a container for purified liquid and a filter module with liquid inlet and outlet means, characterized in that it is capable of displacing all the crude liquid from the receiving tank for the crude liquid, provided that the gas volume is greater than the volume of the crude liquid in the receiving tank for the crude liquid .

2. A device for cleaning a liquid according to claim 1, characterized in that the automatic means of time-controlled gas injection is configured to continue the process of filtering the liquid, by displacing part of the liquid from the filter module, after filtering all the liquid from the receiving tank for the crude liquid into the tank for purified liquid.

3. A device for cleaning a liquid according to claim 1, characterized in that the control unit is configured to directly control a pneumatic gas injection unit.

4. A device for purifying a liquid according to claim 1, characterized in that the filtering module is provided with a means preventing the penetration of the purified liquid back into the module.

5. A device for purifying a liquid according to claim 4, characterized in that the means preventing the penetration of the purified liquid back into the module is preferably a check valve.

6. The device for cleaning liquid according to claim 4, characterized in that the means preventing the penetration of the purified liquid back into the module is located at the top of the filter module.

7. The liquid purification device according to claim 4, characterized in that the means preventing the penetration of the purified liquid back into the module is located at the bottom of the filter module.

8. A device for cleaning liquid according to claim 1, characterized in that in the upper part of the filter module there is a means for exiting the purified liquid into the container for the purified liquid.

9. The device for cleaning liquid according to claim 8, characterized in that the means for exiting the purified liquid is located above the level of the purified liquid located in the container for the purified liquid.

10. A device for cleaning liquid according to claim 1, characterized in that the filter module consists of at least two filter elements.

11. A device for purifying a liquid according to claim 10, characterized in that the filter module is configured to allow liquid to pass through it, changing the direction of liquid passage at least 1 time.

12. The liquid purification device according to claim 10, characterized in that the filter module is made in such a way that preferably part of the filtered liquid enters the container for purified liquid, and a smaller part of the liquid remains in the filter module to moisten the filter elements.

13. A device for cleaning a liquid according to claim 10, characterized in that the filter module is made in such a way that the gas flow, entering the filter module, and changing the direction of passage through the module at least 1 time, captures the liquid particles and is removed together with them from the filter module, through the outlet of the purified liquid.

14. A device for purifying a liquid according to claim 13, characterized in that the filter module is designed in such a way that when the gas passes under the action of centrifugal forces, a smaller part of the liquid is trapped in the "dead zones" of the filter module.

15. The method of cleaning the liquid is to fill the receiving tank with a crude liquid, the cycle of the automatic means of time-controlled gas injection when closing the lid of the water purifier by pumping gas into a receiving tank for the crude liquid, under the pressure of which the crude liquid passes from the receiving tank for the crude liquid through the filter module to the receiving tank for the purified liquid, with a gradual decrease in the excess gas pressure until the end of the filtration process with the possibility of further repeating the cycle of the automatic means of time-controlled gas injection, characterized in that the crude liquid under pressure is displaced from the receiving tank for the crude liquid with a gas volume greater than the volume of the crude liquid in the receiving tank for untreated liquid, and after turning off the automatic means of time-controlled gas injection, the liquid remaining in the receiving tank for the crude liquid, under the pressure of an excess gas volume, passes through the filter module into the tank for the purified liquid.